package com.laz.knowledge.eight;

import java.util.concurrent.BlockingQueue;
import java.util.concurrent.Future;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;

public class TraceThreadPoolExecutor extends ThreadPoolExecutor {

	public TraceThreadPoolExecutor(int corePoolSize, int maximumPoolSize, long keepAliveTime, TimeUnit unit,
			BlockingQueue<Runnable> workQueue) {
		super(corePoolSize, maximumPoolSize, keepAliveTime, unit, workQueue);
	}

	public void execute(Runnable command) {
		super.execute(wrap(command, clientTrace(), Thread.currentThread().getName()));
	}

	public Future<?> submit(Runnable task) {
		return super.submit(wrap(task, clientTrace(), Thread.currentThread().getName()));
	}

	private Exception clientTrace() {
		return new Exception("client stack trace");
	}

	private Runnable wrap(final Runnable task, final Exception clientStack, String clientThreadName) {
		return new Runnable() {

			public void run() {
				try {
					task.run();
				} catch (Exception e) {
					clientStack.printStackTrace();
					throw e;
				}
			}
		};
	}
}
